Shift Lever Pivot Center Positioning Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing shift lever devices face challenges in maintaining accurate positioning of the pivot center due to assembly errors in the rotation shafts and misalignment of semicircular arc faces in the base bracket, affecting the precision of the shift lever's operation.
Innovation Solution
The shift device incorporates a supporting member with a supporting shaft or hole and an operating member with a corresponding shaft or hole, allowing precise pivoting and integration of a detection section to enhance positioning accuracy, along with a slide section for easy insertion of the supporting shaft into the hole, thereby improving the pivot center's positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the select rotation shaft is assembled to the shift rotation shaft, then the shift lever can be supported to pivot in the select direction, but the positioning accuracy of the pivot center is degraded due to assembly margin of error
Solution Approach 1:
The invention merges the select rotation shaft and shift rotation shaft into a single integrated rotation shaft structure. This eliminates the assembly interface between two separate shafts, thereby removing the assembly margin of error that degraded positioning accuracy. The integrated shaft maintains the pivoting support function while achieving precise pivot center positioning.
Solution Approach 2:
The invention segments the base bracket into an upper side bracket and a lower side bracket, with the rotation shaft passing through both. This segmentation allows each bracket to be independently manufactured and positioned, with the rotation shaft serving as a precise reference that eliminates misalignment issues between the semicircular arc faces of the brackets.
2Ease of operation
If the base bracket is configured by assembling upper side bracket and lower side bracket, then the shift lever can be supported to pivot in the shift direction, but the positioning accuracy of the pivot center is degraded due to misalignment of semicircular arc faces
Solution Approach 1:
The invention merges the upper side bracket and lower side bracket into a single integrated base bracket structure. This eliminates the assembly interface between the two brackets, thereby removing the misalignment of semicircular arc faces that degraded positioning accuracy. The integrated bracket maintains the pivoting support function while achieving precise pivot center positioning.
Solution Approach 2:
The rotation shaft serves as an intermediary element that passes through both the upper side bracket and lower side bracket. This intermediary provides a precise reference axis that ensures proper alignment of the semicircular arc faces, eliminating misalignment issues even when the brackets are assembled separately.
3Manufacturing precision
If the supporting shaft is inserted into the supporting hole from the axial direction, then the positioning accuracy of the pivot center is improved, but the assembly process becomes more complex
Solution Approach 1:
Instead of inserting the supporting shaft into the supporting hole in the conventional axial direction, the invention inverts the assembly approach by inserting the shaft from the radial direction. This inversion simplifies the assembly process while maintaining the high positioning accuracy of the pivot center, as the shaft can be directly positioned into the hole without complex alignment procedures.
Data Source
AI summary
A shift device capable of improving positioning accuracy of a center of pivot of a shift lever assembly is provided. The device includes a shift lever plate that is integrally provided with a supporting shaft and a supporting hole, and a shift lever assembly that is integrally provided with the other of the supporting shaft or the supporting hole. The shift lever assembly is supported by the shift lever plate so as to be capable of pivoting by insertion of the supporting shaft into the supporting hole from the axial direction, and operates a vehicle transmission. The shift device further includes a lever guide housing including a pressing tab that has both a pressing portion and a restricting portion engageable with the supporting shaft. When the supporting shaft is pressed by the pressing portion of the lever guide housing, the restricting portion of the pressing tab enters between the supporting shaft and the supporting member so as to restrict movement of the supporting shaft.